She's still a Permanent Secretary, she's loyal, and she did what was required of her, she used her cleverness to mis-direct over why the government only did the right thing at the very end. (And that's still open to question.) But although she was willing to use mis-direction to provide cover, she sensibly wasn't willing to put a layer of untruth over the truth. And so despite what she was saying, the subtext of what she was really saying was evident.
One thing I found funny is that she was in good control of herself but sometimes when she trying it on, Australian up-speak tended to creep in.
More unintentional comedy was provide by "Full, fair, and prompt" with respect to compensation payments. She went into mandarin to non-explain what this meant which then turned rather Jesuitical.
Although I wasn't wholly convinced by Staunton's evidence, Munby's evidence suggested to me that he would have got the message: "of course you can give full and fair compensation, but we'll only fund if it's done on the cheap".
Overall, Munby's evidence wasn't about which naughty person did X, but was more what were the forces operating that contributed to the mess the government made of managing the scandal.